Add to the Model M the acoustics of a typical open office plan found at most startups and its unbearable. Its not uncommon to have a startup in a concrete loft type space with a group of people who insist on using whatever the modern $200 hipster version of a "buckling spring" keyboard is. It's "cred" man.
Unicomp sells actual buckling spring keyboards. They bought the tech from IBM -> Lexmark. Not bad keyboards, and pretty cheap compared to some of the hipster keyboards. I got mine with hardware Dvorak layout.
WAIT, my Model M blasts Slayer at every keystroke. Doesn't yours? It also has Metallica's Kill 'Em All pre-loaded in ROM. I heard if you achieve a fast enough rate it'll go straight to Seek & Destroy :).
Seriously though, these keyboards are LOUD. Most of the folks at my office use very loud keyboards, but we don't mind. We all know that we type faster with them, and we all have noise canceling headphones.
I do have a coworker I currently share an office with who would actually like blasting Slayer. ;-) (Interesting thought experiment: Can I type faster than Dave Lombardo can play the drums?)
With a decent amount of enthusiasm, a Model M can disrupt phonecalls being made in another room entirely.
Best keyboard ever, but I also don't take mine to work any more, out of consideration for my coworkers. Also it's really big and heavy...